Nat Geo is in denial, it may not be 'reproduction' as in the classic definition, but sure looks to me 'affection' went a bit too far to the homo side, this picture shows clearly the cat 'mating position', this is not a rub on the cheek

Hunter explains that males in the same group are "extremely close and bonded. They engage is constant affectionate behavior which, occasionally, extends to a little dry humping. It's not reproductive, nor is it homosexual."